<div *ngIf="hero">
  <h2>{{hero.name | uppercase}} Details</h2>
<div><span>id: </span>{{hero.id}}</div>
<div><label>name: </label><input [(ngModel)]="hero.name" placeholder="name"></div>

<button (click)="goBack()">go back</button>
<button (click)="save()">save</button>
</div>
